WO2003045192A1

WO2003045192A1 - Tension structure of seat back

Info

Publication number: WO2003045192A1
Application number: PCT/JP2002/009589
Authority: WO
Inventors: Isao Kawashima; Takashi Yamaguchi
Original assignee: Ts Tech Co., Ltd.; Honda Giken Kogyo Kabushiki Kaisha
Priority date: 2001-11-29
Filing date: 2002-09-18
Publication date: 2003-06-05
Also published as: CA2466360A1; CN1596079A; CN100398035C; CA2466360C; JP2003164353A; MXPA04005206A; EP1462031A4; US20030098602A1; EP1462031A1; US6755476B2; JP3975282B2

Abstract

A tension structure for forming the seat back of a car seat, comprising coiled springs (3a), (3b), (4a), and (4b) as tension members across the upper parts and intermediate parts of the side frame parts (11) and (12) of a seat back frame (1) and the vertical rail bars (20) and (21) of a tension assembly (2), wherein straight wires (5a) and (5b) having one wire ends fixed around the axes of the vertical rail bars (20) and (21) and the other wire ends fixedly inserted into the retaining rings (14) and (15) of the side frame parts (11) and (12) are installed on the lower parts of the side frame parts (11) and (12), whereby a seating posture can be stabilized by increasing the support pressure of a waste part supported by the tension assembly (2) with the straight wires (5a) and (5b).

Description

Akira Itoda Sho Tension structure of seat back Technical field

The present invention mainly provides a seat back of an automobile seat having a good seating stability by stabilizing a sitting posture, and therefore, the supporting pressure of the waist rather than the supporting pressure of the seat body from the torso to the shoulder. This is related to the seat back tension structure that enhances the performance. Background art

In general, the seat back of an automobile seat is provided with a seat back frame having a substantially quadrangular frame shape, and a cushion spring or a lumbar support is assembled as a tension assembly in the frame of the seat back frame to thereby provide a seat back for the occupant. A tension structure that supports the back from the waist is configured.

As an example of a cushion spring or a lumbar support, it is configured as a tension assembly by arranging a plurality of fine wire wires or zigzag springs in parallel with each other and wrapping them around the left and right vertical bar bars. This cushion spring is held in the frame of the seat back frame by being pulled and held between the side frame parts of the seat back frame and each axis of the vertical bar by the tension members that are stretched over the upper, lower and middle abdomen. It is assembled.

Conventionally, the upper, lower, and mid-abdominal parts of the tension member are provided with coil springs of the same panelate, so that the cushion panel is tensioned and held between each side frame of the seat back frame. It is attached.

According to this coil spring, the cushion spring can be largely elastically displaced by the load of the occupant, so that a large displacement stroke by the cushion spring can be obtained.

By the way, in the seat back of an automobile seat, even if the part corresponding to the shoulder from the torso of the occupant undergoes a large elastic displacement, the supporting pressure of the part corresponding to the waist moves from the torso of the occupant to the shoulder. If the supporting pressure is higher than the supporting pressure of the corresponding part, the waist can be held, so that the seating posture can be stabilized and the seating performance can be improved.

However, in the tension structure using the coil springs of the same panelate as described above, the supporting pressure of the portion corresponding to the waist cannot be increased from the portion corresponding to the waist to the shoulder.

In order to increase the supporting pressure at the part corresponding to the waist, the coil spring of the panel is higher than the coil spring that tensions and holds the part corresponding to the shoulder from the torso of the occupant. It is possible to do.

In this case, it is necessary to prepare another one with a different paneling by using a coil spring of the same form, which not only incurs high costs, but also performs assembly work while distinguishing the coil spring from the difference in paneling. Work must be complicated.

The present invention focuses on the tension member of the tension assembly, and can maintain good cushioning properties, and can be assembled to increase the supporting pressure of the lumbar region without increasing costs and complicating work. The purpose is to provide.

Another object of the present invention is to provide a seat back tension structure that can be reliably assembled by a simple operation so as to increase the supporting pressure of the lumbar region. I do. Disclosure of the invention

According to the present invention, a coil spring of the same panelate is provided as a tension member to be bridged between an upper portion of each side frame portion of the seat back frame and each of the vertical bars of the tension assembly and a middle portion thereof. On the other hand, a straight wire that is bent to the prescribed axis shape and entangled with the axis of the vertical bar and that the other wire end that is bent to the prescribed axis shape is inserted into the stop ring of the side frame and stopped is inserted into the lower part. The tension assembly of the seatback is constructed by holding the tension assembly in the frame of the seatback frame with the coil springs on the upper and middle abdomen and the linear wire on the lower part.

As a result, elastic cushioning springs can be used to maintain good cushioning at the part corresponding to the torso from the torso of the seated person, and elastic deformation can be achieved at the part corresponding to the waist by using a straight wire that does not extend. The degree is reduced. As a result, the waist support pressure can be increased and the seating posture can be stabilized, so that a seat back tension structure with good seating properties can be configured.

At the same time, straight wires are inexpensive and do not incur high costs, and since they differ in form from coil springs, they can be easily distinguished from each other. Assembly work can be performed.

The present invention also provides a straight wire main shaft extending from the side frame portion of the seat back frame obliquely downward at an acute angle to the axis of the vertical bar, and a side frame portion bent at an acute angle from the main shaft. A wire end that is inserted into the stop ring of the vertical bar, a substantially semicircular winding shaft that is hung on the axis of the vertical bar, and a wire end that extends from the winding shaft and intersects with the axis of the wire main shaft. Wire wire is provided.

For the straight wire, insert one wire end into the retaining ring of the side frame, expand the wire end crossing the axis of the wire main axis from the main wire axis, deform it, and turn the substantially semicircular winding shaft into a vertical bar. With the simple work of hooking on the axis of the wire and elastically returning the wire end that intersects with the axis of the wire main shaft, the distance between each side frame of the seat back frame and each vertical bar of the tension assembly is increased. I can hang it over. In the hooked state, the winding axis of the straight wire contacts the axis of the vertical bar at two contact points that are diagonally separated from each other via the axis of the vertical bar, so that the straight wire moves the winding axis in the axial direction of the vertical bar. As a result, it is securely hooked to the axis of the vertical bar so that it does not move up and down, and the lower part of the tension assembly can be stably held in tension.

Features other than those described above will become apparent in the embodiments for carrying out the invention described below. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is an explanatory diagram showing, from the front, a seat back tension structure including a cushion spring as a tension assembly according to an embodiment of the present invention. FIG. 2 is an explanatory diagram showing, from the front, a hooking structure of a straight wire constituting the tension structure of FIG. FIG. 3 is an explanatory diagram showing the straight wire hooking structure of FIG. 2 from a plan view. FIG. 4 is an explanatory view showing a displacement state of a seatback by the coil spring of FIG. FIG. 5 is an explanatory diagram showing a displacement state of the seat back by the straight wire of FIG. FIG. 6 is an explanatory diagram showing a tension structure of a seat back including a lumbar support according to another embodiment of the present invention as a tension assembly.

MODES FOR CARRYING OUT THE INVENTION Hereinafter, description will be made with reference to the accompanying drawings. The basic configuration of the tension structure according to the illustrated configuration will be described with reference to the configuration provided with the cushion panel shown in FIG. 1. The tension members 3a, 3b, and 4 of the seat back frame 1, the cushion spring 2, and the cushion spring 2 are described. a, 4b, 5a, 5b, and the cushion spring 2 is tensioned and held in the frame of the seat back frame 1 by the tension members 3a, 3b, 4a, 4b, 5a, 5b. It consists of.

The seat back frame 1 has an upper frame portion 10 formed by bending a pipe member into a substantially lower chord shape, left and right side frame portions 11 and 12 made of a pipe member of a predetermined length, and a substantially U-shape. And a back frame portion 13 made of a molded frame exhibiting the following. Of these, the upper frame 10 should be welded between the upper parts of the side frames 11 and 12 and the side frames 11 and 12 should be welded and fixed to the left and right sides of the back frame 13. The seat back frame 1 has a substantially quadrangular frame shape.

The cushion panel 2 is provided with left and right vertical bar bars 20 and 21, and the piano wire thin wires 22 and 23 are used as tension members to be entangled with the axis of the vertical bar bars 20 and 21 at each wire end. Therefore, the back pad (not shown) can be received and supported from behind by arranging a plurality of fine wires 22 2 and 23 in parallel with each other and wrapping them around the left and right vertical bars 20 and 21. Assembled. In this configuration, the vertical bar bars 20 and 21 are provided with resin tubes coated with a rubbing noise preventing resin tube.

Of the tension members 3a, 3b, 4a, 4b, 5a, and 5b, the coil springs 3a, 3b, and 4 of the same panelate are used to bridge over the upper side and the middle abdomen of the cushion panel 2. a, 4b are provided so that they are located on the same line on the left and right. The coil springs 3a, 3b, 4a, and 4b have hook-shaped spring ends connected to the axes of the vertical bars 20 and 21 and the stop holes of the side frame portions 11 and 12 (not shown). ) By hanging on the vertical rail It is installed on the upper and middle abdomen between the bars 20 and 21 and the side frame sections 11 and 12.

On the other hand, straight wires 5a and 5b, each of which is formed by bending both ends into a predetermined shape from a medium-thick metal wire, are provided as those to be bridged under the cushion spring 2. The straight wires 5a and 5b are fixed at one end to the axes of the vertical bars 20 and 21 and at the other end to the side frame portions 11 and 12 with a stop ring 1 provided. It is installed in the lower part between the vertical bars 20 and 21 and the side frame parts 11 and 12 by inserting and stopping in 4 and 15.

The straight wires 5a and 5b are formed in advance by axial bending as one stopper. As shown in Fig. 2 and Fig. 3 (only one side is shown), the vertical crossbars extend from the side frame portions 11 and 12 (see Fig. 1) of the seat back frame 1 diagonally downward at an acute angle. A straight wire main shaft 50 leading to the axis of 20; a wire end 51 bent at an acute angle from the wire main shaft 50 and inserted into the retaining ring 14 of the side frame portion 11 to stop; The wire shaft 52 is formed of a substantially semicircular winding shaft 52 hooked on the axis of 20 and a wire end 53 extending from the winding shaft 52 and crossing the axis of the wire main shaft 50.

Since the straight wire 5a is elastically deformed in a direction in which the wire end 53 intersecting with the axis of the wire main shaft 50 is expanded from the wire main shaft 50, a substantially semicircular winding axis is hung on the axis of the vertical bar. The wire ends that intersect with the axis of the wire main shaft are elastically returned, so that they can be provided in advance on the axis of the vertical bar 20. Further, when extending from the vertical bar 20 to the side frame portion 11, the wire end 51 may be inserted into the retaining ring 14 of the side frame portion 11 and stopped. For this reason, the straight wire 5a can be extended between each side frame portion 11 of the seat back frame 1 and each vertical bar 20 by a simple operation. In the hooked state of the straight wire 5a, the wire spindle 50 goes diagonally upward from the axis side of the vertical bar 20, so that the winding shaft 52 passes through the axis of the vertical bar 20. The two contact points a and b (see Fig. 3), which are diagonally separated from each other, make contact with the axis of the vertical bar 20. Therefore, the winding shaft 52 does not move up and down in the axial direction of the vertical bar 20. So that it can be securely hooked.

In the cushion structure of the seat back configured as described above, the portion corresponding to the torso of the occupant from the torso to the shoulder portion, as shown in FIG. Large elastic displacement occurs at 3b, 4a and 4b. On the other hand, at the part corresponding to the waist, as shown in Fig. 5, the axis does not extend even if the axes of the straight wires 5a and 5b swing around the retaining ring 14 of the side frame part 11 as a fulcrum. From this point, the degree of elastic displacement is suppressed.

For this reason, a good cushioning property can be maintained at the portion corresponding to the torso from the torso of the seated person, and at the portion corresponding to the waist, the degree of elastic displacement is suppressed and the waist support pressure can be increased. The ability to hold the waist allows the seating posture to be stabilized.

Next, a case where the lumbar support 6 is provided as a cushion assembly as shown in FIG. 6 will be described. The lumbar support 6 has a main surface portion 61 that can swell and deform a central portion forward, and a plurality of fin portions 62 a, 62 b, 63 a, 63 b from the main surface portion 61 left and right. The flexible plate 60 formed by overhang is assembled as a tension member. The flexible plate 60 is formed by tension-connecting the central main surface 61 to the axis of the vertical bars 20 and 21 with a plurality of fine wires 63 and 64. Provided between 1

The lumbar support 6 also includes coil springs 3a, 3b, 4a, and 4b at the upper and middle abdomen as in the case of the cushion spring 2 described above. By installing the straight wires 5a, 5b, 4a, 4b as the lower pulling members, the axes of the vertical bars 20 and 21 and the seat back frame 1 side frame portion 1 1 and 1 2 Can be equipped between In the lumbar support, the seating posture is stabilized by the back support pressure due to the central bulge of the main surface portion 61 and the waist support pressure due to the lower portion of the flexible plate 60, and the cushioning performance can be improved.

As described above, according to the seat back tension structure of the present invention, good cushioning can be maintained at the portion corresponding to the torso of the occupant from the torso, and elastic displacement can be maintained at the portion corresponding to the waist. Since the degree of restraint can be suppressed and the waist support pressure can be increased, the seating posture can be stabilized, and a seatback for a vehicle seat with good seating properties as a whole can be constructed.

As described above, the terms and expressions used in the present specification are merely used for explanation, and do not limit the content of the present invention in any way. Even if limited terms and expressions are used, there is no intention to exclude equivalents or parts of the embodiments of the present invention described above. Therefore, various changes are made within the scope of the present invention, for which rights are claimed.

Claims

Scope of Word

1. Equipped with a sheet-back frame in the shape of a quadrilateral frame, and a tension assembly in which the tension members are held by left and right vertical bars, and a plurality of tension members are combined with the side frame portion of the seat back frame and the tension assembly. In a seat back tension structure in which a tension assembly is stretched and held by a tension member within a frame of a seat back frame, the tension assembly is bridged between an upper portion, a middle portion, and a lower portion of a three-dimensional vertical bar.

Equipped with coil springs as tension members for the upper and middle abdomen, one wire end bent in a predetermined axial shape is entangled with the axis of the vertical bar, and the other wire end bent in a predetermined axial shape is a side frame portion A seatback tension structure comprising a straight wire that is inserted into and stopped by a retaining ring as a lower tension member.

2. The tension member at the lower part includes a straight wire main shaft extending from the side frame portion of the seat back frame obliquely downward at an acute angle to the axis of the vertical bar, and a side frame bent at an acute angle from the wire main shaft. From the wire end that is inserted into the retaining ring of part 1 and stopped, the approximately semicircular winding shaft that is hooked on the axis of the vertical bar, and the wire end that extends from the winding shaft and intersects with the axis of the wire main shaft 2. The seatback tension structure according to claim 1, wherein the straightback wire comprises: